Home / 3,890.80-5,367.60-2,473.72

Finding the Fourth Proportional to 3,890.80, 5,367.60 and 2,473.72

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Solution

The fourth proportional to 3,890.80, 5,367.60 and 2,473.72 is: 3,412.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,890.80 : 5,367.60 = 2,473.72 : x
  2. Step 2: Convert to fraction form
    3,890.80/5,367.60 = 2,473.72/x
  3. Step 3: Cross multiply
    3,890.80x = 5,367.60 × 2,473.72
  4. Step 4: Simplify right side
    3,890.80x = 13,277,939.47
  5. Step 5: Solve for x
    x = 13,277,939.47/3,890.80
  6. Step 6: Final answer
    x = 3,412.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.